Hisense AKT26UR4RK4 Use And Installation Instructions page 15

6. Mode interfere(for multi-split )
For the reason that all indoor units use one outdoor unit, outdoor unit can only run with same mode
(cooling or heating),so,when the mode you set is different from the mode that outdoor is running with,
mode interfere occurs. Following shows the mode interfere scene.
cooling
√
cooling
√
dry
×
heating
√
fan
Outdoor unit always run with the mode of first indoor unit that turned on. when the setting mode of
following indoor unit is interfered with it, 3 beeps would be heard, and the indoor unit interfered with the
normal running units would turn off automatically.
dry heating fan
√ × √
√ × √
× √ ×
√ × √
√ --- normal
× --- mode interfere
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Operation manual